DDI - Planning

A diverging diamond interchange (DDI) is a type of diamond interchange in which the two directions of traffic on the non-freeway road cross to the opposite side on both sides of the bridge at the freeway.

Reviews

I thought it was a great experience. Great to learn about different ways to improve capacity and safety at intersections. Lots of alternatives.

Connecticut Course Attendee

Class was informative and engaging.

Connecticut Course Attendee

Very well presented information and the workshop kept my attention.

Connecticut Course Attendee

Gil was thorough and enthusiastic, which made enjoyable/relatable presentation.

Connecticut Course Attendee

Very realistic alternatives with clear pros and cons. Explains what intersections work best based on criteria. Great course. Gil was extremely knowledgeable.

Connecticut Course Attendee

Was interesting that pedestrians play such an important / significant role, seems like it’s often forgotten.

Missouri Course Attendee

Gil has a lot of real world application experience.

Missouri Course Attendee

Very knowledgeable and fielded questions effectively.

Missouri Course Attendee

It was wonderful. Instructors knew what they were talking about and were passionate about the subject manner.

Missouri Course Attendee

The concepts were clearly explained and backed up by theoretical and real-world examples.

Missouri Course Attendee

I thought it was great. I appreciate the conversation on things done well and not so well as well as general tips to keep in mind.

Missouri Course Attendee

Best documentation I have received at a seminar. It has relevant reference material, and in not merely a duplication of the PowerPoint presentation.

Massachusetts Course Attendee

Well done with many useful tools for future design problems that may occur.

Maine Course Attendee 1

I appreciated the specific design details and rationale – much better than some other presentations where the material was very abstract and theoretical. Good pictures. Instructor very well prepared and interested in the material – a huge help.

Maine Course Attendee

Great instructor, very knowledgeable.

Maine Course Attendee

The instructor was very confident in his knowledge of the subject.

Maine Course Attendee

Really enjoyed the course – covered enough detail, but not so much to get bogged down.

Minnesota Course Attendee

This is probably the best training course I’ve ever been at. Great job.

Minnesota Course Attendee

This course was a great learning experience by providing many different approaches to solve a variety of problems.

Minnesota Course Attendee

Gave a good overview of intersection and interchange options while encouraging participants to be creative and think about things more.

Minnesota Course Attendee

Great photos for examples and great technical expertise displayed.

Minnesota Course Attendee

Gilbert was passionate and a very good instructor. Good job and good class!

Nebraska Course Attendee

Thought it was an excellent presentation. Provides better understanding of intersection alternatives and appropriate application to solve design issues.

Nebraska Course Attendee

It will open my mind to not just “follow standards” and do what is right/safe.

Nebraska Course Attendee

I think Gil’s experience in the design and instruction of various intersections was most valuable. Very knowledgeable.